Ore-roasting furnace.



PATENTBD MAY 8, 1906.

I. SANPILIPPQ.'

ORE ROASTIG FURNAGE.

APPLIUATION FILED SEPT. 10. 1903.

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lllhllrllE' PTET IGNAZio SANFILIPPO, or CASTELTERMINL rrrirr' osennonsraweieuanaoe..

To all whom it may concern:

Be it known that I, IGNAZIO SANFILIPPO, civil engineer, a subject of the King of Italy, residing at Castelterrnini, Sicily, Italy, have invented certain new and' useful Improvements in or Relating to Ore-Roastin Furnaces, (for which I have applied for etters Patent of Italy on July 8, 1903,) of which the following is a specification.

.This invention relates to certain new and `useful improvements in ore-roasting furnaces and it has for its objects, among others, to provide an im roved device of this character in which the ihrnace is provided with two divided and 'superposed compartments for a v purpose which will hereinafter appear. I

aim also at other improvements, which will also be further described.

The further objects and advantages of the invention will hereinafter appear, and the novel'features thereof will be speciiically dehopper or mouth through which the ore is charged into the upperV compartment. The furnace may be of any desired form. In Fig.

1 I have shown it as terminated at the top by a flat ceiling or top supported on pillars, while in. Fig; 2 it is represented as having a' cupola or vaulted ceiling, the filling-opening in each case being in said top or ceiling. The character of the to however, docs not affect the operationof t e'device and may be changed as may be desired.

fm, designates the upper compartment, and.

n the lower compartment. The lower compartment 'nis surmounted by hollow pillars i,

supported by suitable -means in the lower compartment,.as shown, and these pillars are provided with transverse openings s, as seen in oth views, which openin s extend to the upper ends ofthe pillars an to the top of the upper, compartment m. .The pillars are formed with longitudinal cavities for a purpose-which will soon be made apparent. Th( said pillars facilitate the free passage and circulation of the, hot gases. According to the Specification of Letters Patent.

Application filed September' 10, 1908. Serial No 172,541.

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nature of the ores under treatment the hot gases are to traverse the bulk of the ores from the top'downward, entering through the inlet h and being discharged through ailue e in the direction of` the arrows-as, for instance, in the sulfurous ores-#or vice versa-as, for instance, in the treatment of metallic ores, where the hot gases are to enter from beneath and discharge at the top. Such circulation of the gases through the interior ofthe hollow transversely-perforated pillars could not take place if the said pillars were mounted directly on the bottom of the furnace. provide under the ore-containing chamber m the free compartment n, communicating with i the internal cavities of the pillars.

I therefmey The bottom of the upper compartment is inclined, as shown, and at the lower end of this incline` is the outlet f.

l is a closure of any suitable character.

e is a conduit leading'from the compart` ment n out through the top of the furnace, while lt is a chimney or conduit leading into the high side of the orecompartment lm.

The furnace above descrihedis especially adapted for the metallurgical treatment of diiferentl ores, but moet especially for lthe treatment of crude sulfur ores and the refinement of sulfur. rlhe ore is char ed into the furnace through the upper mout i or hopper a and distributed in the free spaces between the pillars i. The quantity of the ore charged into the furnace is such as to leave uncovered the upper ends of the hollow transversely vheating the mass of the crushed ore in the chamber a, and pass to the inferior chamber it, whencetliey leave the furnacethrough the iiue e. The sulfur liquefied by the action of the hot gases by means of the holes and cavities of tne hollow pillars pours into the coinpartment n and is collected through the dis-i charge f. I'Vhen the operation is finished,

the closure Z is demolished in order to clean out the furnace.

In operation in the treatment of sulfur ores, when 1t is desired to obtain sulfur by-liquefaction due to combustion to a part ofthe ore, and in the analo ous treatments, the gaseous currents are fed gy the conduit It into the upper end-ef the upper compartmentv m along the longitudinal cavities of the pillars in the IOC IOL,

direction of the arrows and escaping through the conduit e, leading from the lower com partment n. In the treatment of a different character, where the heating must be from 5-the bottom upward, the gaseouscurrents should be given a direction of ilow the reverse of that above described.

It is to be noted that the two compartments m and n when the furnace is working ro communicate only by the interior longitudinal cavities of the pillars with each other or through the transverse openings or by openings t iat may be provided in the horizontal partition between the two compartments, r 5 which partition may be supported in any suitable manner in the lower compartment n.

A furnace constructed as above described insures the regular and complete heating of the ore beine treated.

'What is cltimed as new is- 1. In an ore-roasting furnace, two divided and superposed compartments and hollow pillars extending from the lower through the upper compartment and perforated through- 2 5 out their length.

2. In an ore-roasting furnace, two divided and superposed compartments, and hollow pillars extending from the lower through the y upper compartment and having transverse 3o openings at the top of the upper compartment.

3. In an ore-roasting furnace, two divided and superposed compartments, hollow pillars extending from the lower through the upper compartment and perforated throughout their length, and means for introducing gaseous currents to the upper compartment.

4. In an ore-roasting furnace, two divided yand superposed compartments, hollow pillars extending from the lower compartment and through the upper, and having transverse Openings, and means for introducing gaseous currents into the upper compartment and discharging the same through the lower compartment.

, 5. In an ore-roasting furnace, two divided and superposed compartments, and hollow i pillars extending upward through the compartment containing the ore to be treated and perforated throughout their entire length.

6. In an ore-roasting furnace, an upper and a lower compartment the former containing the ores to be treated, and hollowr transversely-perforated pillars traversing the same from top to bottom, and an under compartlment communicating with the hollows of the 

